Alert archive / Iowa / Dense Fog Advisories in 2021

Dense Fog Advisory 8, NWS Des Moines, IA

March 16, 202131 counties in Iowa

NWS Des Moines, IA issued this dense fog advisory at Mar 16, 2021, 1:06 AM CDT for 31 counties in Iowa. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Mar 16, 2021, 1:06 AM CDT (06:06 UTC)
Expired: Mar 16, 2021, 9:00 AM CDT
In force: 8 hr
Issued by: NWS Des Moines, IA

All 31 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Greene County, IA, Guthrie County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Pocahontas County, IA, Polk County, IA, Ringgold County, IA, Sac County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Webster County, IA

The radar

The Des Moines radar (KDMX), 36 km from the middle of the area, began a volume at 06:08 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this dense fog advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before this dense fog advisory went out at Mar 15, 6:33 PM CDT, 6 hours 33 minutes earlier.

Area forecast discussion, Mar 15, 6:33 PM CDT, 6 hours 33 minutes before

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Hazardous weather outlook, Mar 15, 3:53 PM CDT, 9 hours 13 minutes before

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<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Nearby

Dense Fog Advisories in Iowa, 2021 Every dense fog advisory in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.